Originating from IT roots, where it also refers to a less than pleasant prospect, to "perform a core dump" (in some marginally civilized, yet uncouth circles of urbanity) refers to the process of laboriously evacuating one's bowels - usually resulting in a hefty pile and dispersed shrapnel all over the porcelain scooter.

Dang, man! Did you have to come and perform a core dump at MY possy?!

To the mall security guard: "Dude, where's the jazz?! I urgently need to perform a core dump, or I might embarrass the shoppers!